This is a pre-release version of the X server from The X.Org Foundation.
It is not supported in any way.
Bugs may be filed in the bugzilla at http://bugs.freedesktop.org/.
Select the "xorg" product for bugs you find in this release.
Before reporting bugs in pre-release versions please check the
latest version in the X.Org Foundation git repository.
See http://wiki.x.org/wiki/GitPage for git access instructions.

It looks like you haven't loaded the kernel driver for your video card. You may want to post details of your system such as what video card you have, what modules you have loaded (perhaps look in /boot/loader.conf).